package com.itheima.reggie.filter;/**
 * 功能描述
 *
 * @author 唯硕
 * @date 2022/09/19  15:59
 */

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 *@ClassName LoginCheckFilter
 *@Description TODO Web过滤器  检查用户是否完成登录
 *@Author 唯硕
 *@Date 2022/9/19 15:59
 *@Version 1.0
 */
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
     //路径匹配器支持通配符
    public static  final AntPathMatcher PATH_MATCHER= new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //获取本次请求的URI
        String requestURI = request.getRequestURI();

        log.info("本次请求的路径{}",requestURI);
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
            "/user/sendMsg",
               "/user/login",

        };

        boolean check = Check(urls, requestURI);
        //如果不需要处理这直接放行
        if(check){
            log.info("本次请不需要处理{}",requestURI);
            filterChain.doFilter(request,response);
           return;
        }

        //判断登陆状态如果已登录则直接放行
          if (request.getSession().getAttribute("employee")!=null){
              long id = Thread.currentThread().getId();
              log.info("线程id为{}",id);
             Long emplId = (Long) request.getSession().getAttribute("employee");
              BaseContext.setCurrentId(emplId);
              log.info("用户已登录，用户ID为{}",request.getSession().getAttribute("employee"));
              filterChain.doFilter(request,response);
              return;
          }
        //判断移动端用户登陆状态如果已登录则直接放行
        if (request.getSession().getAttribute("user")!=null){
            long id = Thread.currentThread().getId();
            log.info("线程id为{}",id);
            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);
            log.info("用户已登录，用户ID为{}",request.getSession().getAttribute("user"));
            filterChain.doFilter(request,response);
            return;
        }

          //如果未登陆则返回未登录结果，通过输出流的方式向客户端页面响应数据
        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString( R.error("NOTLOGIN")));
          return;


    }

    public boolean Check( String[] urls,String requestURI){
        for(String url: urls){
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match)
                return  true;
        }
        return  false;
    }
}
